Chevrolet 2002 Tahoe Owner's Manual page 221

The Traction Assist System may operate on dry roads
under some conditions. When this happens, you may
notice a reduction in acceleration. This is normal and
doesn't mean there's a problem with your vehicle.
Examples of these conditions include a hard acceleration
in a turn, an abrupt upshift or downshift of the
transmission or driving on rough roads.
If your vehicle is in cruise control when the TAS begins
to limit wheel spin, the cruise control will automatically
disengage. When road conditions allow you to safely
-
use it again, you may re engage the cruise control. See
"Cruise Control" in the Index.
4-10
When the TRACTION
OFF light is on, the TAS
is off and will not limit
wheel spin. Adjust your
driving accordingly.
The TRACTION OFF light will come on under the
following conditions:
D
The Traction Assist System is turned off, either by
pressing the TAS on/off button or turning off the
automatic engagement feature of the TAS.
D
The transmission is in FIRST (1); TAS will not
operate in this gear. This is normal.
D
The vehicle is driven on an extremely rough road.
When the vehicle leaves the rough surface, slows
down or stops, the light will go off and TAS will be
on again. This is normal.
D
A Traction Assist System, Anti
-
or engine related problem has been detected and the
vehicle needs service.
See "Traction Off Light" in the Index.
-
Lock Brake System